Over burning problem in some zones, in Image engrave

I try to engrave an image and I have a problem.
There are some zones that are over burning and other that are “normal”.
In the zones that are overburnig the laser does small dots, and in the normal zones the laser makes a line whit uniform power.
I also notice that the laser goes slow during the dots sequences.
I upload the settings and the preview from Lightburn.
How can I solve the problem?

If you are willing, post the image. I see that you have ‘Pass-through’ enabled so LightBurn is just burning what you have supplied in the image. I suspect these are a part of the image itself.

Yes, the image is optimize and the preview is ok, but the laser make the shortest line with more Power maybe, and slowly.

Anyone can help me?

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